Qtopia Greenphone with Linux

The Qtopia Greenphone is a Linux based mobile phone that can easily be modified with your own software for unlimited innovation. "Offered as part of the Greenphone SDK, it makes Linux-based applications easier to build and faster to bring to market. This powerful GSM/GPRS device provides the perfect platform for creation, testing and demonstration of new mobile technology services and ships loaded with Qtopia Phone Edition."

From Qtopia:
A FRESH APPROACH TO THE MOBILE ECO-SYSTEM
Open PlatformGreenphone offers a development environment that is equivalent to a GSM/GPRS mobile phone with the capability to re-flash the applications memory.
Proven TechnologyMore than 4 million Linux phones have shipped worldwide with Trolltech's application frameworks.
Community AwarenessTrolltech's open source and commercial developer ecosystem has as many as 150,000 developers worldwide.